Averages

Averages–Objectives

I can work out the Mode.

I can work out the Range.

I can make up data sets with a particular mode and range.

Different Averages

Key words

Mode

Range

Data Set

Mode

I don’t want to brag,

I don’t want to boast,

I am the MODE,I am the most.

ModeThis bar chart shows the scores in a science test:

What was the mode of scores?

6

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1 2 3 4 5 6 7 8 9 10

Nu

mb

er

of

pu

pils

Marks out of ten

Mode?

Finding the mode

A dice was thrown ten times. These are the results:

What was the modal score?

3 is the modal score because it appears most often.

Mode

What is the modal method of travel?

Method of travel Frequency

Bicycle 6

On foot 8

Car 2

Bus 6

Train 3

8Most children travel on foot.

Travelling on foot is therefore the modal method of travel.

Mode?

Most people walk to school.

How children travel to school

0

2

4

6

8

10

12

walk train car bicycle bus other

Method of travel

Nu

mb

er

of

ch

ild

ren

Girls’ mode? Boys’ mode?

Favourite subjects

Girls' and boys' favourite subjects

0

1

2

3

4

5

6

7

8

Maths Science English History PE

Favourite subject

Nu

mb

er

of

pu

pils

Girls

Boys

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101214161820

Sprin

t

Long

dist

ance

runn

ing

Hurdl

es

High

jum

p

Long

jum

p

Trip

le ju

mp

Shot

Discus

Jave

lin

Freq

uen

cyCompare this graph to the previous one. Favourite athletics event

What is the modal sport?

Averages–Objectives

I can work out the Mode.

I can work out the Range.

I can make up data sets with a particular mode and range.

Range

From largest to smallest, See how they change,Take them away,And I am the RANGEBiggest number – Smallest number

RangeThis bar chart shows the scores in a science test:

What was the Range of scores?

10 – 1 = 9

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1 2 3 4 5 6 7 8 9 10

Nu

mb

er

of

pu

pils

Marks out of ten

Compare this graph to the previous one. Favourite athletics event

0

2

4

6

8

10

12

14

0 1 2 3 4 5 6Numbers of sports played

Frequency

What is the Range of the number of sports played?

6 – 0 = 6

Averages–Objectives

I can work out the Mode.

I can work out the Range.

I can make up data sets with a particular mode and range.

Key points?

Mode Most

Range Biggest number – Smallest number

Page 200. Q2, 3Extension Q4

What I Learnt Today

1.

2.

What I am unsure about…. 1.